Homemade Bay Rum recipes
http://artofmanliness.com/2010/01/21/diy-bay-rum-aftershave/
http://theshaveden.com/forums/threads/alfons-homemade-bay-rum-recipe.16334/
Or you can buy a 1 oz bottle of the essence on Ebay and mix it with rubbing alcohol, wintergreen, & water. Makes a 2 quarts.
Thanks